e191c21e04
When we update the main monitor, there is a rule that makes it so that popup windows use the same main monitor as their parent. In the commit f4d07caa38e51d09ee73bab20334a6b5c28952d6 the call that updates and fetches the main monitor of the toplevel accidentally changed to update from itself, causing a indefinite recursion eventually resulting in a crash. Closes: https://gitlab.gnome.org/GNOME/mutter/issues/279
Mutter
Mutter is a Wayland display server and X11 window manager and compositor library.
When used as a Wayland display server, it runs on top of KMS and libinput. It implements the compositor side of the Wayland core protocol as well as various protocol extensions. It also has functionality related to running X11 applications using Xwayland.
When used on top of Xorg it acts as a X11 window manager and compositing manager.
It contains functionality related to, among other things, window management, window compositing, focus tracking, workspace management, keybindings and monitor configuration.
Internally it uses a fork of Cogl, a hardware acceleration abstraction library used to simplify usage of OpenGL pipelines, as well as a fork af Clutter, a scene graph and user interface toolkit.
Mutter is used by GNOME Shell, the GNOME core user interface. It can also be run standalone, using the command "mutter", but just running plain mutter is only intended for debugging purposes.
License
Mutter is distributed under the terms of the GNU General Public License, version 2 or later. See the COPYING file for detalis.